Microscopic, single-celled organisms that often cause recurrent diseases are called
A) viruses.
B) parasites.
C) protozoa.
D) bacteria.

Name: Microscopic, single-celled organisms that often cause recurrent diseases are called A) viruses. B) parasites. C) protozoa. D) bacteria.
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Quizplus · Accepted Answer

Protozoa are single-celled organisms that can cause recurrent diseases such as malaria, giardiasis, and toxoplasmosis. Viruses, bacteria, and parasites can also cause diseases, but they may not always be recurrent.

Microscopic, Single-Celled Organisms That Often Cause Recurrent Diseases Are Called